Sahih al-Bukhari Book 10, Hadith 65
The Prophet (ﷺ) said, "If supper is served, and Iqama is pronounced one should start with the supper."
I heard Anas saying, "A man from Ansar said to the Prophet, 'I cannot pray with you (in congregation).' He was a very fat man and he prepared a meal for the Prophet (ﷺ) and invited him to his house. He spread out a mat for the Prophet, and washed one of its sides with water, and the Prophet (ﷺ) prayed two rak`at on it." A man from the family of Al-Jaruid asked, "Did the Prophet (ﷺ) used to pray the Duha (forenoon) prayer?" Anas said, "I did not see him praying the Duha prayer except on that day."
Allah's Messenger (ﷺ) said, "If the supper is served start having it before praying the Maghrib prayer and do not be hasty in finishing it."